Want to know which Washington Post articles made the list of the most-shared articles on Facebook in 2011?

On Tuesday, the social networking site released a list of the 40 most-shared articles. Three Washington Post articles, all published on Post blogs, made the list.

Obama’s and Bush’s effects on the deficit in one graph

Ezra Klein’s look at a New York Times graphic that compared the Obama and Bush deficits was just two paragraphs. The post was shared several times on Facebook by Washington Post social media producers and currently lists more than 78,000 Facebook recommends.

Penn State, my final loss of faith

As the Jerry Sandusky sex abuse scandal enveloped Penn State, university alum Thomas Day wrote a very personal account of why he’s lost faith in the leadership of his parent’s generation.

The post went viral after Chris Hayes, editor at large at The Nation, read part of it on his MSNBC show, “Up With Chris Hayes.” Hayes also tweeted about it on Saturday, Nov. 12. Social Media experts note that content is most likely to be shared on the weekends.

New Zodiac sign dates: Don’t switch horoscopes yet

Melissa Bell offered a look at interesting, if really confusing, changes to the Zodiac and how they would affect various signs.The post was recommended by more than 58,000 Facebook users.

In all, 39 of the 40 articles on the list came from just five media brands: CNN, Yahoo, The New York Times, The Huffington Post and The Post.

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